Roof material for motor vehicles

Abstract

A roof material for motor vehicles includes an upper fabric, a lower fabric and a rubber layer arranged between them. The upper fabric includes polyacrylonitrile warp and filling threads. The warp threads are endless filaments (multifilaments). The upper fabric has a protective, polymeric coating on its top side. The rubber layer includes two rubber layers with an intermediate layer of high-strength material.

What is claimed is: 
     
       1. A roof material for a motor vehicle, comprising an upper fabric, a lower fabric and a rubber layer disposed therebetween, said upper fabric being comprised of polyacrylonitrile warp threads and polyacrylonitrile filling threads wherein at least the polyacrylonitrile warp threads are endless threads, said rubber layer being comprised of at least two rubber sublayers and an intermediate layer disposed between said sublayers. 
     
     
       2. The roof material of claim 1, wherein said polyacrylonitrile filling threads are endless threads. 
     
     
       3. The roof material of claim 1, further comprising a transparent, plastic coating disposed on at least a top side of said upper fabric, said coating being a protective coating for said roof material. 
     
     
       4. The roof material of claim 3, wherein said coating includes a fluorine-containing polymer. 
     
     
       5. The roof material of claim 4, wherein said fluorine-containing polymer is a tetrafluoroethylene polymer. 
     
     
       6. The roof material of claim 1, wherein said intermediate layer comprises a layer of fibers or filaments. 
     
     
       7. The roof material of claim 6, wherein said fibers or filaments are fibers or filaments of a material selected from the group consisting of carbon, steel, polyethylene and polyamide. 
     
     
       8. The roof material of claim 6, wherein said fiber or filaments are arranged as a lattice fabric. 
     
     
       9. The roof material of claim 8, wherein said fibers or filaments of said lattice fabric layer are oriented at an angle between about 30° and about 60° to the longitudinal axis of said lattice fabric. 
     
     
       10. The roof material of claim 9, wherein said fibers or filaments of said lattice fabric are oriented at an angle of about 45° to the longitudinal axis of said lattice fabric. 
     
     
       11. The roof material of claim 1, wherein said lower fabric comprises a woven or knitted fabric. 
     
     
       12. The roof material of claim 11, wherein said woven or knitted fabric comprises a fabric of synthetic fiber or filament. 
     
     
       13. The roof material of claim 1, further comprising an electrically conductive material disposed in said roofing material for connection to an anti-theft means for said motor vehicle. 
     
     
       14. The roof material of claim 13, wherein said electrically conductive material is an electrically conductive material selected from the group consisting of fiber, filament, wire and foil strip. 
     
     
       15. The roof material of claim 14, wherein said electrically conductive material is disposed in said upper fabric. 
     
     
       16. The roof material of claim 14, wherein said electrically conductive material is disposed in said intermediate layer. 
     
     
       17. The roof material of claim 14, wherein said electrically conductive material is disposed in said lower fabric.